SECTION 07610 - SHEET METAL ROOFING by BhLE6Hj

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									Umicore Building Products USA, Inc: VM ZINC®                                                     08 02 2002



SECTION 07610 – FACTORY FORMED METAL ROOF PANELS
This Guide Specification is intended to aid the Design Professional in specifying and detailing Umicore
Building Products USA Inc. VM DEXTER ZINC® PLUS system. It is the responsibility of the Design
Professional to verify that all conditions, materials, means and methods are properly addressed and meet
the requirements of local building code officials and jurisdictions.

This document includes hidden text with comments to the specifier with respect editing recommenda-
tions.


PART 1 - GENERAL


1.1        RELATED DOCUMENTS

      A.   Drawings and general provisions of the Contract, including General and Supplementary
           Conditions and Division 1 Specification Sections, apply to this Section.

      B.   Umicore Building Products USA Inc.’s Published Recommendations and Installation
           Instructions
1.2        SUMMARY

      A.   This Section includes the following sheet metal roofing:

           1.    Factory Formed and Field Assembled VM DEXTER ZINC® PLUS.

      B.   Related Sections include the following:

           1.    Division 5 Section "Steel Deck" for steel roof deck supporting sheet metal roofing.
           2.    Division 5 Section "Cold-Formed Metal Framing" for secondary support framing
                 supporting sheet metal roofing.
           3.    Division 6 Section "Rough Carpentry " for roof sheathing, vertical battens and skip
                 sheathing
           4.    Division 7 Section "Building Insulation" for roof insulation.
           5.    Division 7 Section "Sheet Metal Flashing and Trim" for fascia, copings, flashings and
                 other sheet metal work not part of sheet metal roofing.
           6.    Division 7 Section "Roof Accessories" for accessories on roof.
           7.    Division 7 Section "Joint Sealants" for field-applied sheet metal roofing sealants.


1.3        PERFORMANCE REQUIREMENTS

      A.   General: Provide complete VM ZINC® alloy sheet metal roofing system, including, but not
           limited to roll formed metal roof pans, cleats, clips, anchors and fasteners, sheet metal flashing
           and drainage components related to sheet metal roofing, fascia panels, trim, wood battens, skip
           sheathing, underlayment, and accessories as indicated and as required for a weather tight
           installation.




VM ZINC® FACTORY FORMED METAL ROOF PANELS                                                          07610 - 1
Umicore Building Products USA, Inc: VM ZINC®                                                   08 02 2002


  B.    Installation: All VM ZINC® sheet metal roofing systems and materials shall be installed using
        the best available industry standards and the means and methods recommended in the
        manufacturer’s published information, or whichever is more stringent.

  C.    Wind-Uplift Resistance: Provide complete roofing system including roll formed sheet metal
        VM ZINC® roofing capable of resisting the design pressures indicated. Provide clips,
        fasteners, and clip spacing of type indicated and with capability to sustain, without failure, the
        design loads. Design loads shall be established by the design professionals responsible for the
        project and local code requirements.

        1.    Design Uplift Pressures: [As indicated on Drawings by the design professional.]

              a.     Field: [As indicated in the Contract Documents].
              b.     Perimeter: [As indicated on Drawings].
              c.     Corner: [As indicated on Drawings].
              d.     Other: [As indicated on Drawings].

  D.    Thermal Movements: Provide sheet metal roofing that allows for thermal movements resulting
        from the following maximum change (range) in ambient and surface temperatures by preventing
        buckling, opening of joints, hole elongation, overstressing of components, failure of joint
        sealants, failure of connections, and other detrimental effects. Provide clips that resist rotation
        and avoid shear stress as a result of sheet metal roofing thermal movements. Base engineering
        calculation on surface temperatures of materials due to both solar heat gain and nighttime-sky
        heat loss.

        1.    Temperature Change (Range): 120 deg F (67 deg C), ambient; 180 deg F (100 deg C)
              material surfaces.

  E.    Water Infiltration: Provide sheet metal roofing that does not allow water infiltration to building
        interior, with metal flashing and connections of sheet metal roofing lapped to allow moisture to
        run over and off the material.




VM ZINC® FACTORY FORMED METAL ROOF PANELS                                                        07610 - 2
Umicore Building Products USA, Inc: VM ZINC®                                                    08 02 2002




1.4        SUBMITTALS

      A.   Product Data: For each product indicated. Include details of construction relative to materials,
           dimensions of individual components and profiles, and finishes.

      B.   Shop Drawings: Show fabrication and installation layouts of sheet metal roofing, including
           plans, elevations, and keyed references to termination points. Distinguish between shop- and
           field-assembled work. Shop drawings to be reviewed by Umicore Building Products USA, Inc.
           prior to fabrication. Include the following:

           1.    Details for forming sheet metal roofing, including seams and dimensions.
           2.    Details for joining and securing sheet metal roofing, including layout of fasteners, clips,
                 and other attachments. Include pattern of seams.
           3.    Details of termination points and assemblies, including fixed points.
           4.    Details of expansion joints, including showing direction of expansion and contraction.
           5.    Details of roof penetrations.
           6.    Details of edge conditions, including eaves, ridges, valleys, rakes, crickets, and
                 counterflashings.
           7.    Details of special conditions.
           8.    Details of connections to adjoining work.
           9.    Details of the required accessory items.
           10.   Sheet metal roofing and attachments.
           11.   Roof-mounted items including roof hatches, equipment supports, pipe supports and
                 penetrations, lighting fixtures, snow guards, and items mounted on roof curbs.

      C.   Samples for Verification: For each type of exposed component required, prepared on Samples
           of size indicated below:

           1.    Sheet Metal Roofing: 24 inches (600 mm) long by actual panel width, including finished
                 seam. Include fasteners, cleats, clips, battens, closures, and other attachments.
           2.    Trim and Closures: 24 inches (600 mm) long. Include fasteners and other exposed
                 accessories.
           3.    Accessories: 24-inch- (600-mm-) long Samples for each type of accessory.
           4.    Snow Guards: Full-size Sample.

      D.   Qualification Data: For firms and persons specified in the “Quality Assurance” Article to
           demonstrate their capabilities and experience. Include lists of completed projects with project
           names and addresses, names and addresses of architects and owners, and other information
           specified.


1.5        QUALITY ASSURANCE

      A.   Installer Qualifications: Engage an experienced installer who has completed sheet metal
           roofing similar in material, design, forming method and extent to that indicated for this Project
           and with a record of successful in-service performance. Provide evidence of installer
           participation in Umicore Building Products USA Inc.® PRO-ZINC Training Course.




VM ZINC® FACTORY FORMED METAL ROOF PANELS                                                         07610 - 3
Umicore Building Products USA, Inc: VM ZINC®                                                    08 02 2002


  B.     Sheet Metal Roofing Fabricator Qualifications: Shop that employs skilled workers who
        custom-fabricate sheet metal roofing similar to that required for this Project and whose products
        have a record of successful in-service performance. Provide evidence of installer participation
        in Umicore Building Products USA Inc. PRO-ZINC Training Course.

  C.    Sheet Metal Roofing Standard: Comply with VM ZINC® Architectural Binder, Installation
        Manual, or industry best standards, whichever is more stringent. Conform to dimensions and
        profiles shown unless more stringent requirements are indicated.

  D.    Mockups: Before installing sheet metal roofing, construct mockups for each form of
        construction required to verify selection made under Sample submittals and to demonstrate
        aesthetic effects and qualities of materials and execution. Build mockups to comply with the
        following requirements, using exposed and concealed materials and forming methods indicated
        for completed work.

        1.    Locate mockups in the location and of the size indicated or, if not indicated, as directed
              by the Architect.
        2.    Approval of mockups is for other material and construction qualities specifically
              approved by Architect in writing.
        3.    Approval of mockups does not constitute approval of deviations from the Contract
              Documents contained in mockups unless such deviations are specifically approved by
              Architect in writing.
        4.    Approved mockups may become part of the completed Work if undisturbed at time of
              Substantial Completion.

  E.    Preliminary Roofing Conference: Before starting roof framing and sheathing construction,
        conduct conference at Project site. Review methods and procedures related to roof framing and
        sheathing construction and metal roof panels including, but not limited to, the following:

        1.    Meet with Owner, Architect, Owner's insurer if applicable, testing and inspecting agency
              representative, metal roof panel Installer, structural-support Installer, and installers whose
              work interfaces with or affects metal roof panels.
        2.    Review and finalize construction schedule and verify availability of materials, Installer's
              personnel, equipment, and facilities needed to make progress and avoid delays.
        3.    Review methods and procedures related to metal roof panel installation, including
              manufacturer's written instructions.
        4.    Examine support conditions for compliance with requirements, including alignment
              between and attachment to structural members.
        5.    Review flashings, special siding details, roof penetrations, openings, and condition of
              other construction that will affect metal roof panels.
        6.    Review governing regulations and requirements for insurance, certificates, and tests and
              inspections if applicable.
        7.    Review temporary protection requirements for metal roof panel assembly during and
              after installation.
        8.    Review roof panel observation and repair procedures after metal roof panel installation.




VM ZINC® FACTORY FORMED METAL ROOF PANELS                                                        07610 - 4
Umicore Building Products USA, Inc: VM ZINC®                                                    08 02 2002



      F.   Pre-installation Conference: Conduct conference at Project site. Review methods and
           procedures related to sheet metal roofing including, but not limited to, the following:

           1.    Meet with Owner, Architect, Roofing Consultant, Owner's insurer if applicable, sheet
                 metal roofing Installer, and installers whose work interfaces with or affects sheet metal
                 roofing including installers of roof accessories and roof-mounted equipment.
           2.    Review and finalize construction schedule and verify availability of materials, Installer's
                 personnel, equipment, and facilities needed to make progress and avoid delays.
           3.    Review methods and procedures related to sheet metal roofing installation.
           4.    Examine substrate conditions for compliance with requirements, including flatness and
                 attachment to structural members.
           5.    Review flashings, special roofing details, roof drainage, roof penetrations, equipment
                 curbs, and condition of other construction that will affect sheet metal roofing.
           6.    Review governing regulations and requirements for insurance, certificates, and testing
                 and inspecting if applicable.
           7.    Review temporary protection requirements for sheet metal roofing during and after
                 installation.
           8.    Review roof observation and repair procedures after sheet metal roofing installation..
           9.    Document proceedings, including corrective measures and actions required, and furnish
                 copy of record to each participant.


1.6        DELIVERY, STORAGE, AND HANDLING

      A.   Deliver all metal roofing elements and components so as not to be damaged or deformed.
           Package sheet metal roofing materials for protection during transportation and handling.

      B.   Unload, store, and erect sheet metal roofing materials in a manner to prevent bending, warping,
           twisting, and surface damage.

      C.   Stack materials on platforms or pallets, covered with suitable weather tight and ventilated
           covering. Do not store roofing components or elements in contact with other materials that
           might cause staining, denting, or other surface damage.

      D.   Protect strippable protective covering on sheet metal roofing from exposure to sunlight and high
           humidity, except to extent necessary for period of sheet metal roofing installation.


1.7        COORDINATION

      A.   Coordinate installation of roof curbs, equipment supports, and roof penetrations.

      B.    Coordinate sheet metal roofing with rain drainage work, flashing, trim, and construction of
           metal decks, sheathing, purlins and rafters, parapets, walls, and other adjoining work to provide
           a leak proof, secure, and non-corrosive installation.


1.8        EXPRESS LIMITED COMMERCIAL PRODUCT WARRANTY
           Available upon request.




VM ZINC® FACTORY FORMED METAL ROOF PANELS                                                         07610 - 5
Umicore Building Products USA, Inc: VM ZINC®                                                08 02 2002




PART 2 - PRODUCTS


2.1        PANEL MATERIALS

      A.   VM ZINC® sheet: Electrolytic, 99.995 percent pure zinc with alloying additives of titanium
           and copper.

           1.    Manufacturer:

                 a.    UMICORE BUILDING PRODUCTS USA Inc., -

                       1)    Phone: 503-827-0600
                       2)    Fax: 503-827-0770
                       3)    Email: info@vmzinc-us.com

           2.    Available thickness: [0.028 inch (0.70 mm)], [0.031 inch (0.80 mm)], [0.039 inch (1.00
                 mm)], [0.059 inch (1.50 mm)], unless otherwise indicated.

           3.    Surface Aspects:

                 a.    VM QUARTZ ZINC® PLUS: A zinc with a dark gray aspect on the exposed side
                       and protected on its underside by a proprietary 60 micron coating of furnace-
                       polymerized polyester and polyurethane-polyamide liquid.
                 b.    VM QUARTZ ZINC® : A zinc with a dark gray aspect on both sides
                 c.    ANTHRA ZINC® PLUS: A zinc with a black aspect on the exposed side and
                       protected on its underside by a proprietary 60 micron coating of furnace-
                       polymerized polyester and polyurethane-polyamide liquid.
                 d.    ANTHRA ZINC®: A zinc with a black aspect on both sides.




VM ZINC® FACTORY FORMED METAL ROOF PANELS                                                    07610 - 6
Umicore Building Products USA, Inc: VM ZINC®                                      08 02 2002



        4.    Alloy Properties:

                  Periodic table reference             Zn
                  Thickness tolerance                  +/- 1/1000" (0.025 mm)
                  Density                              200 lb/in3 (7.2 kg/dm3)
                  Thermal expansion                    1/64"/ft 212° F (2.2 mm/m 100° C)
                  Melting point                        788° F (420° C)
                  Re-crystallization point             572° F (300° C)
                  Limit of elasticity: Rp 0.2          >= 14,504 PSI (100 N/mm2)
                  Tensile strength                     >= 21,756 PSI (150 N/mm2)
                  Elongation at fracture               >= 40%
                  Elongation in creep test (50 N/mm2
                  or 7250 PSI over a period of 60
                  minutes)                             0.1%
                  Vickers hardness                     >= 40
                  Heat conductivity                    110 W/mk
                  Young's modulus                      11,603,200 PSI (80,000 N/mm2)
                  Not magnetic
                  UV resistant
                  Non flammable


        5.    VM ZINC® Premium Zinc Manufacturing Standard exceeds EN 988:

                  Specification                        VM ZINC® Tolerance
                  Alloy Tolerances
                  Copper (%)                           0.08 – 0.20
                  Titanium (%)                         0.07 – 0.12
                  Aluminum (%)                         <= 0.015

                  Dimensional Tolerances
                  Thickness                            +/- 0.02 mm
                  Width                                +2 / -0 mm
                  Length                               +5 / -0 mm
                  Curvature                            <= 1.5 mm/m
                  Flatness                             <= 2mm



        6.    VM ZINC® PLUS properties. Coating on backside of the zinc to have a minimum
              abrasion resistance of 140 liters as per ASTM D-968, method A.




VM ZINC® FACTORY FORMED METAL ROOF PANELS                                          07610 - 7
Umicore Building Products USA, Inc: VM ZINC®                                                  08 02 2002




2.2        UNDERLAYMENT MATERIALS

      A.   Available Products: Subject to compliance with requirements, underlayment products that may
           be incorporated into the Work include, but are not limited to, the products specified.

      B.   Underlayment: ROOFSHIELD® by PROCTOR for VM ZINC® Fabric Underlayment and Slip
           Sheet: High permeability, triple layer spun bonded non-woven polypropylene fabric

           1.    Weight: 6.1 oz./sq.yd. (175g/sq.m.)
           2.    Thickness: 0.023 inch (0.60 mm)
           3.    Water Vapour Transmission 9.79 Perms (1.96 grams/kPa*h*m) per ASTM E 96 Method
                 A.

      C.   Vapor Retarder: Self-Adhering, Polyethylene-Faced Sheet: ASTM D 1970, 40 mils (1.0 mm)
           thick minimum, consisting of slip-resisting polyethylene-film reinforcing and top surface
           laminated to SBS-modified asphalt adhesive, with release-paper backing; cold applied.

           1.    Available Products:

                 a.    Grace, W. R. & Co.; Grace Ice and Water Shield.
                 b.    Henry Company; Perma-Seal PE.
                 c.    Johns Manville International, Inc.; Roof Defender.
                 d.    NEI Advanced Composite Technology; AC Poly Ice and StormSeal.
                 e.    Protecto Wrap Company; Rainproof TM.
                 f.    Soprema, Lastobond (60 mil w/ sanded face for traction on steep slope
                       applications)

      D.   Flashing and Low-Slope Flashing: Self-Adhering, High-Temperature Sheet: 30 to 40 mils (0.76
           to 1.0 mm) thick minimum, consisting of slip-resisting polyethylene-film top surface laminated
           to layer of butyl or SBS-modified asphalt adhesive, with release-paper backing; cold applied.
           Provide primer when recommended by underlayment manufacturer.

           1.    Thermal Stability: Stable after testing at 240 deg F (116 deg C); ASTM D 1970.
           2.    Low Temperature Flexibility: Passes after testing at minus 20 deg F (29 deg C);
                 ASTM D 1970.
           3.    Available Products:

                 a.    Carlisle Coatings & Waterproofing, Div. of Carlisle Companies Inc.; Dri-
                       Start "HR" High Performance Roofing Underlayment.
                 b.    Grace, W. R. & Co.; Vycor Ultra.
                 c.    Henry Company; Perma-Seal PE.




VM ZINC® FACTORY FORMED METAL ROOF PANELS                                                      07610 - 8
Umicore Building Products USA, Inc: VM ZINC®                                                    08 02 2002




2.3        MISCELLANEOUS MATERIALS

      A.   Fasteners: Self-tapping screws, bolts, nuts, self-locking rivets and bolts, end-welded studs, and
           other suitable fasteners designed to withstand design loads. Provide exposed fasteners with
           heads matching color of metal roof panels by means of plastic caps or factory-applied coating.

           1.    Fasteners for Roof Panels: VM ZINC® Wood screws 4mm-thread diameter bugle head,
                 Phillips drive, 316 Stainless Steel.
           2.    Fasteners for Flashing and Trim: Blind fasteners or self-drilling 410 stainless screws
                 with pancake head.
           3.    Blind Fasteners: High-strength stainless-steel rivets.


2.4        UMICORE BUILDING PRODUCTS FACTORY FORMED ROOFING ELEMENTS

      A.   Standing-Seam-Profile, Concealed Fastener Metal Roof Panels. Formed with raised, curved top
           standing-seam-shaped major rib at panel edge and flat pan between major rib and panel edge.

           1.    VM DEXTER ZINC® PLUS

                 a.     VM DEXTER ZINC® PLUS, A patented roof system based on factory formed 15
                        ¾” x 32 7/8” (400 mm x 835mm) rectangular shaped VM ZINC® PLUS elements
                        featuring factory formed interlocking edges. Panels are secured with concealed
                        fastener and clip arrangement.
                 b.     System includes factory formed clips and fasteners.
                 c.     Limited to applications on slopes of 2 1/2:12 and greater.
                 d.     Thickness: 0.028 inch (0.70mm)
                 e.     Available finishes: [VM QUARTZ-ZINC® PLUS]

      B.   VM DEXTER ZINC® PLUS Fixed Clips: 300 Series Stainless Steel Clips. Thickness: 0.024”
           (0.6mm). The clip is pre-punched for attachment. Designed to withstand negative load
           requirements. Clip is designed to engage standing seam profile.

      C.   Fastener for VM DEXTER ZINC® PLUS Fixed Clips: Wood screws, 300 Series Stainless
           Steel. All fasteners to seat in pre-punched holes of VM ZINC® Clips to eliminate potential for
           contact and abrasion between fastener head and panel. Fastener head profile shall eliminate
           telegraphing through metal panel. Fasteners shall be selected to resist all negative design load
           requirements. Minimum pullout strength: 112 lbf (50 daN)

           1.    Available products:

                 a.     VM ZINC® Wood screw 4mm thread diameter bugle head, Phillips drive, 316
                        Stainless Steel

           2.    Design professional and installer to confirm the withdraw and rupture performance for all
                 fastener and clip combinations during the submittal process.




VM ZINC® FACTORY FORMED METAL ROOF PANELS                                                         07610 - 9
Umicore Building Products USA, Inc: VM ZINC®                                                      08 02 2002



      D.   Fasteners for Trim Attachments

           1.    Fasteners for Flashing and Trim.
                 a.    Blind fasteners or self-drilling 410 stainless screws with pancake head.

           2.    Blind Fasteners: High-strength stainless-steel rivets
                 a.    High-strength stainless steel rivets.


2.5        Solder, Sealing

      A.   Solder for Zinc: ASTM B 32, 60 percent lead and 40 percent tin with low antimony, as
           recommended by manufacturer.

      B.   Stripping

           1.    VM ZINC® Stripping Agent and Flux DECA-QUARTZ for removal of coating prior to
                 soldering

      C.   Low to Medium-Modulus Neutral-Curing Silicone Sealant; One part polyurethane Sealant:
           Where joint sealants of this type are indicated, provide products complying with the following:

           1.    Products: Available products include the following:

                 a.     SikaFlex 11fc
                 b.     795; Dow Corning.

           2.    Type and Grade: S (single component) and NS (nonsag).
           3.    Class: 25.
           4.    Use Related to Exposure: NT (nontraffic).
           5.    Stain-Test-Response Characteristics:      Nonstaining to          porous   substrates   per
                 ASTM C 1248.


2.6        ACCESSORIES

      A.   Sheet Metal Roofing Accessories: Provide components required for a complete sheet metal
           roofing assembly including trim, copings, fasciae, corner units, ridge closures, clips, flashings,
           sealants, and similar items. Match material and finish of sheet metal roofing, unless otherwise
           indicated.

           1.    Closures: Provide closures at eaves and ridges, fabricated of same metal as sheet metal
                 roofing.
           2.    Clips: Minimum 0.0396-inch (1.0mm) thick, 300 series stainless-steel panel clips
                 designed to withstand negative load requirements.
           3.    Cleats: Mechanically seamed cleats formed from minimum 0.0250-inch- (0.64mm) thick
                 300 series stainless steel.
           4.    Backing Plates: Provide metal backing plates at panel end splices, fabricated from
                 material recommended by manufacturer.




VM ZINC® FACTORY FORMED METAL ROOF PANELS                                                         07610 - 10
Umicore Building Products USA, Inc: VM ZINC®                                                      08 02 2002


      B.   Flashing and Trim: Formed from VM ZINC® PLUS Sheet. Provide flashing and trim as
           required to seal against weather and to provide finished appearance. Locations include, but are
           not limited to, eaves, rakes, corners, bases, framed openings, ridges, fasciae, and fillers. Finish
           flashing and trim with same finish system as adjacent sheet metal roofing.


2.7        FABRICATION

      A.   General: Formed sheet metal roofing to comply with Umicore Building Products USA Inc.’s
           Published Recommendations and details reviewed by Umicore Building Products USA Inc.,
           and industry best standards that apply to the design, dimensions (pan width and seam height),
           geometry, metal thickness, and other characteristics of installation indicated. Fabricate sheet
           metal roofing and accessories at the shop to greatest extent possible.
      B.   Fabricate sheet metal roofing to allow for expansion in running work sufficient to prevent
           leakage, damage, and deterioration of the Work. Form exposed sheet metal work to fit
           substrates without excessive oil canning, buckling, and tool marks, true to line and levels
           indicated, and with exposed edges folded back to form hems.
           1.     Lay out sheet metal roofing so cross seams, when required, are made in direction of flow
                  with higher pans overlapping lower pans. Stagger cross seams.
           2.     Fold and cleat eaves and transverse seams.
           3.     Form and fabricate sheets, seams, strips, cleats, valleys, ridges, edge treatments, integral
                  flashings, and other components of metal roofing to profiles, patterns, and drainage
                  arrangements shown and as required for leak proof construction.

      C.   Metal Protection: VM ZINC® Panels and Materials shall not be stored or installed so that they
           come in contact with or are located beneath areas with copper or copper containing components.




VM ZINC® FACTORY FORMED METAL ROOF PANELS                                                         07610 - 11
Umicore Building Products USA, Inc: VM ZINC®                                                      08 02 2002




PART 3 - EXECUTION


3.1        GENERAL ASSEMBLY

      A.   Cold Roof Assembly

           1.    Cold Roof

                 a.     Structural Sheathing: Minimum ¾” Exterior Grade Plywood. Insulation,
                        ventilation, and appropriate moisture vapor control measures should be verified by
                        a qualified design professional to reduce the potential for condensation beneath the
                        roofing components.
                 b.     Underlayment/Slip sheet: High permeability, triple layer spun bonded
                        polypropylene fabric lapped minimum 6” and sealed. Apply self adhering high
                        temperature sheet membrane flashing at perimeter and valleys as required by code
                        requirements.
                 c.     Umicore building products factory formed VM DEXTER ZINC® PLUS roofing
                        elements.

  3.2      EXAMINATION

      A.   Examine substrates, areas, and conditions, with Installer present, for compliance with
           requirements for installation tolerances, sheet metal roofing supports, and other conditions
           affecting performance of work.

           1.    Examine primary and secondary roof framing to verify that rafters, purlins, angles,
                 channels, and other structural panel support members and anchorages have been installed.
           2.    Examine solid roof sheathing to verify that sheathing joints are supported by framing or
                 blocking and that installation is within flatness tolerances.
           3.    Verify that substrate is sound, dry, smooth, clean, sloped for drainage, and completely
                 anchored, and that provision has been made for roof drains, scuppers, flashings, and
                 penetrations through sheet metal roofing.
           4.    For the record, prepare written report, endorsed by Installer, listing conditions detrimental
                 to performance of work.

      B.   Examine roughing-in for components and systems penetrating sheet metal roofing to verify
           actual locations of penetrations relative to seam locations of sheet metal roofing before sheet
           metal roofing installation.

      C.   Proceed with installation only after unsatisfactory conditions have been corrected.


3.3        UNDERLAYMENT AND VAPOR RETARDER INSTALLATION

      A.   Fabric Underlayment and Slip Sheet: Install underlayment/slip sheet on roof sheathing on
           continuous surface under sheet metal roofing. Use mechanical fasteners in the laps for
           anchorage. Apply tape as per manufacturer recommendation to seal the laps. Apply at locations




VM ZINC® FACTORY FORMED METAL ROOF PANELS                                                         07610 - 12
Umicore Building Products USA, Inc: VM ZINC®                                                     08 02 2002


           indicated on Drawings, in shingle fashion to shed water, with lapped and taped joints of not less
           than 6 inches (150 mm). Cover underlayment within 60 days.

      B.   Self-Adhering Sheet Underlayment: Install self-adhering sheet underlayment, wrinkle free, on
           continuous sheathing. Apply primer if required by underlayment manufacturer. Comply with
           temperature restrictions of underlayment manufacturer for installation; use primer rather than
           nails for installing underlayment at low temperatures. Apply at locations indicated on Drawings
           , in shingle fashion to shed water, with end laps of not less than 6 inches (150 mm) staggered 24
           inches (600 mm) between courses. Overlap side edges not less than 3-1/2 inches (90 mm). Roll
           laps with roller. Cover underlayment within 14 days.

      C.   Install flashings to cover underlayment to comply with project requirements.


3.4        INSTALLATION, GENERAL

      A.   General: Anchor sheet metal roofing and other components of the Work securely in place, with
           provisions for thermal and structural movement. Install fasteners, solder, welding rods,
           protective coatings, separators, sealants, and other miscellaneous items as required for a
           complete roofing system.

           1.    Field cutting of sheet metal roofing by torch is not permitted.
           2.    Provide metal closures at peaks rake edges rake walls and each side of ridge and hip caps.
           3.    Locate and space fastenings in uniform vertical and horizontal alignment.
           4.    Install ridge and hip caps as sheet metal roofing work proceeds.
           5.    Locate roofing splices over, but not attached to, structural supports. Stagger roofing
                 splices and end laps to avoid a four-panel lap splice condition.
           6.    Lap metal flashing over sheet metal roofing to allow moisture to run over and off the
                 material.

      B.   Allowable Erection Tolerance
           1.   Maximum Alignment Variation: 1/8 in (3 mm)

      C.   Fasteners: Use fasteners of type and size that will secure the roof components in compliance
           with requirements of the project. Clip fasteners shall be selected with heads that will seat flush
           to the deck, eliminating potential for contact and abrasion with the panel, and telegraphing.

      D.   Conceal fasteners and expansion provisions where possible in exposed work and locate to
           minimize possibility of leakage. Cover and seal fasteners and anchors as required for a weather
           tight installation.


3.5        UMICORE BUILDING PRODUCTS FACTORY FORMED VM DEXTER ZINC® PLUS
           ROOFING ELEMENTS INSTALLATION

      A.   General: Install , Umicore Building Products factory formed VM DEXTER ZINC® PLUS
           roofing elements in compliance with Umicore Building Products USA’s published
           recommendations, Designer approved Shop Drawings, and industry best standards. User
           Guides are available from Umicore Building Products and should form the basis of design.




VM ZINC® FACTORY FORMED METAL ROOF PANELS                                                        07610 - 13
Umicore Building Products USA, Inc: VM ZINC®                                                   08 02 2002


      B.   VM DEXTER ZINC® PLUS: Fasten VM DEXTER ZINC® PLUS roof panels to roof supports
           with concealed clips at each standing seam joint at location, spacing and with fasteners
           recommended by UMICORE Building Products.

           1.  Install clips to supports with specified fasteners
           2.  Nest standing seams and fasten together by interlocking, fully engaged to provide
               weathertight joints.
           3.  Installing adjacent VM DEXTER ZINC® PLUS Panels
               a.     Place the side of the VM DEXTER ZINC® PLUS with rounded profile onto the
                      side of the adjacent panel with the oblique fold already laid.
               b.     Lay down the VM DEXTER ZINC® PLUS panel, placing the side with the
                      oblique fold under the oblique fold of the lower adjacent VM DEXTER ZINC®
                      PLUS element already laid.
               c.     Push the VM DEXTER ZINC® PLUS panel upwards, engaging the clip into the
                      riveted single welt of the lower adjacent panel, leaving a 1/8 in (3mm) for
                      movement.
               d.     Fix the top of the VM DEXTER ZINC® PLUS panel using a clip inserted into the
                      center of the safety fold of the panel.
               e.     Fix the zone where the VM DEXTER ZINC® PLUS panels overlap with a side
                      clip.
               f.     Fix the VM DEXTER ZINC® PLUS Panel half way along the oblique side of the
                      panel before proceeding with installation of the next VM DEXTER ZINC® PLUS
                      panel
3.6        CLEANING AND PROTECTION

      A.   Clean exposed metal surfaces of dirt and debris with warm water (no high pressure) and gently
           rubbing the panels in the same direction as the grain of the zinc using a clean cotton cloth.

      B.   Clean and neutralize flux materials. Clean off excess solder.

      C.   Remove protective films within 60 days of installation. On completion of sheet metal roofing
           installation, clean finished surfaces, including removing unused fasteners, metal filings, rivet
           stems, and pieces of flashing. Maintain in a clean condition during construction.


END OF SECTION 07610




VM ZINC® FACTORY FORMED METAL ROOF PANELS                                                       07610 - 14

								
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